They let you compare text, convert them into other types (like numbers), split them, count the number of letters, words, or lines, change case, or replace parts of them with new text values.
they let you adjust the font, size, style, and color of all or part of a text value.
They do EVERYTHING with numbers.
They let you create date values without worrying about the computer’s date settings, pick date values apart (i.e., get just a Month from a date), convert Day and Month numbers into proper names, and work with weeks and fiscal years.
They create time values form hours, minutes, and seconds. Useful when trying to find out how long something took.
There is ONLY ONE Timestamp function: it lets you build a timestamp value from a separate date and time.
They calculate STATISTICS such as Average, Variance, and Standard Deviation, but can also count things, sum things, and find Minimums and Maximums. By definition, AGGREGATE FUNCTIONS gather up multiple values and find results based on the group as a whole.
Sum ( Line Items::Extended Price ). This function would AGGREGATE the field’s value from EVERY RELATED RECORD, the Invoice total, in this case.
There’s only ONE Summary Function: GetSummary. Its purpose is to let you use the value of a Summary Field in your calcs. This Function is outdated, though, and not really necessary.